Summary and Keywords
Cyclicity in syntax constitutes a property of derivations in which syntactic operations apply bottom-up in the production of ever larger constituents. The formulation of a principle of grammar that guarantees cyclicity depends on whether structure is built top-down with phrase structure rules or bottom-up with a transformation Merge. Considerations of minimal and efficient computation motivate the latter, as well as the formulation of the cyclic principle as a No Tampering Condition on structure-building operations (Section 3.3) without any reference to special cyclic domains in which operations apply (as in the formulation of the Strict Cycle Condition (Section 2) and its predecessors (Section 1)) or any reference to extending a phrase marker (the Extension Condition (Section 3)). Ultimately, the empirical effects of a No Tampering Condition on structure building, which conform to strict cyclicity, follow from the formulation of the Merge operation as strictly binary. This leaves as open questions whether displacement (movement) must involve covert intermediate steps (successive cyclic movement) and whether derivations of the two separate interface representations (Phonetic Form and Logical Form) occur in parallel as a single cycle.
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